Apparatus for making pneumatic tires



E. H. THUMP. APPARATUS FOR MAKING PNEUMAUCHTIRES.

APPLCATION FILED NOV.24| 1917- Patented May 30, 1922.

3m manto/z,

vouter casing or tire` shoes of double tube PATE 4Nr Jcries.

ELNO H. TRUMP, or SEBRING, oHIo, AssIGNoR' or oNE-ALF To JOHN MALDERFER,

or. AKRON, eine,

.A Application med November 24, 1917. .serial No.- 203,722.

To all whom t'may concern." Be it known that I ELN@ H. 4T'RUMP, avcitizen of the ,United States, residing at Sebring, in theb c ounty ofMahoning and State of Ohio, have invented new and useful Improvements inApparatus for `Making Pneumatic Tires, o f which the following is aspecification. l

NThis invention yhas relation to improvements in cores for themanufacture of the pneumatic tires and the objects thereof are toprovide an improved core, in association with which is employed/an'y airbag by which the fabric and ca-rcassof the tire shoe may be stretchedyand' straightened either previous to or during the vulcanizingoperation.`

More specifically it may be stated that the invention pertains tothattype ofcore which is commonly employed `in -the` manufacture ofautomobile casings or tire shoes, whereinit is desirablev to Stretch the'fabric' or'coinpleted tire shoe, eitherl preliminary to or during thevulcanization thereo-fand it is especially adaptable for usein'connection with a sectional coresuch as is commonly employed for themanufa'cturecf tire casin or tire shoes. f

t is of course 'well known to' those skilled in the4 art, thatthe coresnowk almost universally employed are ofsectional confor; mation, whereinthe sections are united together temporarily during the buildingtu andvulcanization of the shoe or casing an which are disino'untdordismantled by the successive removal .pf the various segment shapedsections of the core. Furthermore, it'is well known in the tire art thatwhen a tire-shoe casing has been built up, upon `a sectional core in anunvulcanized condition,

the core and casing or shoe are enclosed in a suitable mold during Athevvulcanizing operation. v v

In order to elfectually stretchthe fabric employed in the building up ofthe shoe or casing various means have heretofore been resorted to, sothat an even tension or density is'pre'sent inthe finished product.Ordi# narily this result Vis accomplished by building the tire on a.solid corevwhich is removed as soon as the building up process iscompleted and an air bag is inserted in place of the building core.The'tire is lthen placed Witb- Specictiono Letters IPatent,

ArPAnArUsron MAKING PNEUMATIC Trans,

Patented canization.

Considerable time is consumed in remov- May so, i922."

ing the building core and substituting the,` v air bag. Such air bagssoon become perma-v nently expanded and enlarged when in con- .stant usenecessitating very frequent re` placement.

One of the objects of my invention isto.l

provide an air bag which may be used .as a yielding surface for the tirebuilding core whileK4 thetire is being built thereon and whicli'may beinliated to stretch the tire carcass before or during vulcanization.

A further Objectis to provide an air bag.' the usefulness of whichwillnot be impaired by the vpermanent enlargement occasioned by continualuse. y

With the foregoingl and other objects in.,

view thevinvention consist-s in the novel construction, combination andarrangement of parts constituting the invention to be hereina-fterspecifically. described and illustrated .in the accompanying drawingswhich form va partherof, wherein `is shown the,

Per Iferred embodiment of the invention, but

itis

f to be understood that changes,l variationsy and modifications can beresorted to, whichA` come within theI seppe of the matter lherein-`after claimed. y

In t-he drawings in which similar reference numerals indicate like partsin the different. figures,

F igurel is a transverse sectional View ofy .a device embodying thepresent invention;

said` section being taken approximately on linel of .Figure 2, and;.Figure 2 is alongitudinal section taken .approximately on line 2 ofFigure l.

Referring to `the drawings in detail the reference-numeral l, designatesa core coml,prising a plurality of segment-shaped sec- I formation, asthe customary practice in the tire buildingy art,I

tions arranged in annular fand one,y of said sections designated by the.reference numera12 is wedgeshaped to constitute a key section as is thecustomary practice, and the ends to abut against the ends of contiguoussections three' and four. As' is. Wellknown in the tire building art,each section is hol- \thereof are adapted lowed or cored-out to provideal recess 5 for n lutility o f the same will not be impaired as the'ci'rcuinferentially extending channel 9 can be constructed ofsufficient depth to said air bag.

Having thus described invention VI' lclaim l. A tirel building andstretchingvcore.'

comprising an annular rigid core member, a

flexible, hollow, elastic annulus constructed' in the forni ,of altubeflattened and folded upon itself so that approximately one-half of itswall is concentrically arranged in respect to the other half, the innerside of said annulus conforming to and .arranged upon the peripheral andlateral face of the core andthe outer side thereofvconforming to the'inner face of the tires'to be constructed thereon, fand means to inflateand deflate said annulus.,

2. A tire building and stretching core l comprising an annular rigidcore member,

a flexible, hollow, elastic annulus constructed in the form of a tubeflattened and folded upon itself so that approximately one-half of itswallis concentrically arranged in re. spect to the other half, the innerside of said annulus conforming to and arranged upon the peripheral andlateral face ofthe core andl the' outer side thereof conforming to theinner face of the tire to be constructed thereon, and means to inflateand deflate said annulus comp/rising a tubulous member ex tending'inwardly through the rigid core member. J

3.' A tire shoe building and stretching core comprising an aniiularrigid corev member, the peripheral and lateral face of which are cutaway to provide a positioning surface, an air bag on said surfacecomprising a flexible, elastic hollow annulus constructed in the'form ofa tube flattened 'and folded uponv itself so that approximately one-halfits wall is concentric-ally arranged in respect to the other half, theinner side of said annulus confo ming to the peripheral and lateral facef -th core and the outer side thereof conforming with the inner surfaceof the tire to be constructed thereon, andv means to inflate and deflatesaid air bag comprising a tubulous member extending l radially throughsaid core.l

4. A tire shoe buildingand stretching core comprising an annular coremember of rigid material, the peripheral and lateral face ofv whichconforms concentrically with the inner face of the tire to be built orvulcanized thereon, said peripheral. and lateral face constructedsubstantiallyA smaller than the inner face of the tire to' allow ationing surface, an annularv air bag on said surface constructed inthe'form of a colthereof .conforming to the peripheral and lateral facerofthe core land -thefouter sur- 4 y a V lfacev thereof conforming yto theinner wall l allow a material variation 1n the size of`V of the tire tobe'built -orvulcanized thereon, said, core having a kcircumferentialextending undercut groove in each'lateral face i to accommodatethehinwardly y.extending edges of. said air bag, and means .to inflatesaid air. bag. y i f 5. A tire shoe building and stretching coreincluding a core memberformed `of a plurality of separable sectionswhich, when assembled end to end, form a rigid annulus, the peripheraland lateral .face of which conforms concentrically with.the inner faceof the tire to be built or vulcanizedlthereon, said peripheraland"lateral face constructed substantially smaller than lthe inner faceof said tire; 'an annular -air bag constructed in the form of acollapsed elastic-tube so that one-half of thewall thereof. isconcentrically arranged in respect tothe other half, the outer surfacethereof conforming to the inner wall of the tirel to be manufacturedthereon, said' air bag covering the peripheral and lateral face of said4core, and means to inflate said air ba 4 6. A tire shoe building andcom-pacting or stretching, core including an' annular ri id core memberhaving. an inflatable annulair- 'member of elastic non-metallic materialyupon the peripheryftliereof, said inflatable with the member, whencollapsed, forming core member a substantially rigid core for thebuilding of a tire shoe thereon, andl means to introduce air within saidinflatable member to compact or stretch Said tireA Shoe.

7. A tire shoe building and compacting or stretching core including anannular rigid core member having its peripheral surface cut away, aninflatable annular member of flatable member to compact or stretch saidtire shoe. v

8. A tire shoe building and comp'acting or stretching core including anannular rigid core member havingan expansible and con;

tractible means on the peripherythereof,

said means, when contracted, formingl with the core member lasubstantially rigid core for the building of a tire shoe thereon, and l'means to expand said expansible and contractible means tire to compact'vor stretch said 9. A tire shoe building and compacting or stretchingcore including .an annular rigid core member' having` an expansible andcontractible pneumatic means on the periphery thereof. said means, whencontracted, formingwitlr the core member a substantially rlgid core t'orthe building ot' a tire shoel thereon, and means to expandl saidexpansible and contractible means to stretch said tire shoe.

10. lnfcombination a tire core havingr a shape substal'itiallyconformingto the intecompact or rior surface of a tire easing` andinflatable,

elastic, non-metallic means interposablel between the tire casing` andsaid core.

lLfA tire building1 core vcmnprising an annular rigid corecol'ntorining?r in shape to the tire to be built thereon, and aninflatable, elastic, non metallic sheath positioned around theperipheral portions of said core.

12. A hollow. inflatable, elastic', non-metallic member adapted to bepositioned upon the peripheral'and lateral face of' a tire core Vin adeflated condition so as to provide inv connection therewith a formuponwhich a tire may be built up.

1'3. A hollow, inflatable, elastic, iionme-n tallic member vadapted tobe positioned upon the peripheral and lateral face of a tire core in adeflated conditionjsp` as to provide in connection therewith a form uponwhich a tire maybe built up, and means to inflate4 said member duringthe vulcanization of a tire constructed thereon.

14. A distensible member 'of non-metallic y elastic material adapted `tobe positioned upon the peripheral and lateral face of a. tire core, soas to normallyprovide in combination therewith, a form upon which aAtire may1 be built, and means to distend said member during thevulcanizationof the'tire.

l5. In combination With a tire vvcore,^an

inflatable sheath of non-metallic elastic ma.-

terials adapted to ,cover theperipheral por '17. n combination, a tire.vcore, having va'sbape substantially conforming to the shape of a tirecasing to .beconstructed thereon, but offset smaller around theperipheral and lateral portions thereof, and

an inflatable sheath,otnon-metallicv elastic I'material covering theperipheral portions i,of

said core so as to 'provide in yconnection therewitht when `collapsed, aformfupon which a tirev casing' may be built u ,f and means 'to inflatesaid sheath and istend.

has been completed. Y

t8. A fluid-tight,` hollow, elastic, non-Ine tallgic mantle, anda coreWithin said mantle. 19.111 combination, al fluidetight, hollow7 elastic,non-metallic mantle, and` acore pro: vided withan inlet foi-'introducingan eX- paidingffluidto said mantle. p

f testimony whereof I have hereunto set 'my hand in presence of twosubscribing Witneswes. Y -f Etno TRIUM?.

said casing after the building up process Witnesses: u

SYLvEsirae Hammam H. REWINQ.

